I could bunker you could bunker he could bunker we could bunker you could bunker they could bunker
V-ing form
I could be bunkering you could be bunkering he could be bunkering we could be bunkering you could be bunkering they could be bunkering
Perfect
I could have bunkered you could have bunkered he could have bunkered we could have bunkered you could have bunkered they could have bunkered
V-ing perfect
I could have been bunkering you could have been bunkering he could have been bunkering we could have been bunkering you could have been bunkering they could have been bunkering
Negation
Simple form
I couldn't bunker you couldn't bunker he couldn't bunker we couldn't bunker you couldn't bunker they couldn't bunker
V-ing form
I couldn't be bunkering you couldn't be bunkering he couldn't be bunkering we couldn't be bunkering you couldn't be bunkering they couldn't be bunkering
Perfect
I couldn't have bunkered you couldn't have bunkered he couldn't have bunkered we couldn't have bunkered you couldn't have bunkered they couldn't have bunkered
V-ing perfect
I couldn't have been bunkering you couldn't have been bunkering he couldn't have been bunkering we couldn't have been bunkering you couldn't have been bunkering they couldn't have been bunkering
Interrogative form
Simple form
could I bunker? could you bunker? could he bunker? could we bunker? could you bunker? could they bunker?
V-ing form
could I be bunkering? could you be bunkering? could he be bunkering? could we be bunkering? could you be bunkering? could they be bunkering?
Perfect
could I have bunkered? could you have bunkered? could he have bunkered? could we have bunkered? could you have bunkered? could they have bunkered?
V-ing perfect
could I have been bunkering? could you have been bunkering? could he have been bunkering? could we have been bunkering? could you have been bunkering? could they have been bunkering?
Interro-negative form
Simple form
couldn't I bunker? couldn't you bunker? couldn't he bunker? couldn't we bunker? couldn't you bunker? couldn't they bunker?
V-ing form
couldn't I be bunkering? couldn't you be bunkering? couldn't he be bunkering? couldn't we be bunkering? couldn't you be bunkering? couldn't they be bunkering?
Perfect
couldn't I have bunkered? couldn't you have bunkered? couldn't he have bunkered? couldn't we have bunkered? couldn't you have bunkered? couldn't they have bunkered?
V-ing perfect
couldn't I have been bunkering? couldn't you have been bunkering? couldn't he have been bunkering? couldn't we have been bunkering? couldn't you have been bunkering? couldn't they have been bunkering?